> It is possible assign a dificult password to the SYSDBA user and use
> another user for each application?

Yes, but anyone with access to the security database can undo this.

> Is yes, how can I create a user with all privileges and assign a new
> password?
> How can I change the SYSDBA password?

This should be explained in the (IB 6.0) manual.

Elmar